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Tissues and the Primary Groth of Stems, Parenchyma cell, part of vascular…
Tissues and the Primary Groth of Stems
Basic Types of cells and Tissues
Collenchyma
Unevenly thickened primary walls
Typically alive at maturity
Functions
Provides plastic support
Collenchyma cells are parenchyma cells involved in photosynthesis
Sclerenchyma cells
Many dead at maturity
Functions
Provide Elastic support
Water transport
Secondary wall
Primary wall
Two types
Conducting sclerenchyma
Mechanical sclerenchyma
Fibers
Long
Sclereids
Short
Parenchyma cells
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Only have primary thin walls
Parenchyma tissue
Typically alive at maturity
Functions
Grandular cell
Secretes
Mucilage
Resins
Fragnance
Oils
Nectar
Transfer cells
Mediates short distance transport
Concepts
Body of a herb
Stems
Roots
Leaves
Eudicots
Angiosperms
Basal angiosperms
Monocots
Plant body
Primary plant body
Herbaceous
Secondary plant body
Woody
External organization of Stems
Leaf axil
Bud scales
Terminal bud
Axilary bud
Vegetative
Into Branch
Floral bud
Into flower
Phyllotaxy
Arrangement of leaves
Stem organization
Nodes
leaves are attached
Internodes
region between two nodes
Main shoot
Trunk
Internal Organization of Stems: Arrangement of Primary Tissues
Cortex
Compact
No sclerenchyma
Inner to epidermis
Vascular Tissue
Xylem
Conducting cells
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Tracheids
Vessel elements
Tracheary elements
Thickening
Helical thickening
Scalariform thickening
Annular thickening
Reticulate thickening
Circylar boarder pit
Boarder
Pit membrane
Perforation
Vessel
Phloem
Conducting cells
Sieve cells
Sieve tibe membrane
Sieve elements
Sieve areas
Sieve tube
Sieve pores
Sieve plates
Sieve cells
Albuminous cells
Companion cells
Epidermis
Outermost surface
Single layer of parenchyma
Cutin
Cuticle
Contains stroma
Guard cells
Stroma pore
Trichomes
Elongated hairs
Vascular Bundles
Collateral
Primary xylem
Pith
Primary phloem
Xylem and phloem
Stem Growth and Differentiation
Apical meristem
Subapical meristem
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Metaxylem
Protophleom
Exterior cells
Protoxylem
Metapholem
cells close to metaxylem
Protoderm
Provascular tissues
Ground meristem
Tissues
Primary growth
Secondary tissues
Primary tissues
Tissues produces by apical meristem
Parenchyma cell
part of vascular bundle
Conducting cells
